Patna, Dec 07 (ANI): Bollywood star Aamir Khan, who was recently in Patna to promote his upcoming film PK, visited a roadside shop and enjoyed Bihari delicacy litti-chokha. Khan personally rated his character in 'PK' as his best ever performance in the course of his long and distinguished career of 25 years. Talking to reporters at the promotional function, Khan said he plays a different kind of role in the film. The trailer of the film shows Bollywood actor, Anushka Sharma, introducing the protagonist, PK, portrayed by Khan and describing his peculiar traits and habits. 'PK' is directed by Rajkumar Hirani and produced by Vidhu Vinod Chopra and stars Khan and Sharma in the lead. Other actors who will be seen playing important roles in the movie include Bollywood stalwarts like Sanjay Dutt, Sushant Singh Rajput, Boman Irani and Saurabh Shukla. 'PK' is scheduled to hit the silver screen on December 19 worldwide.